Hi my diesel voyager is running rough on tickover I took it to a local garage and could find no faults with the injectors or egr valve .but they did clean the map sensor the car ran great for 2 days then resumed the rough running can anyone tell me where on the manifold is the map sensor so I can replace it thanks .

 

It ran OK for 2 days is an indication to MAP sensor yes and no. So check plug connections for cleanliness and cable for cuts or damage.